Loom harness stop motion



Jan, 3, 1939. HA DESMARNS 2,142,498

LOOM HARNESS STOP MOTION Filed Apri-1 30, 1933,v

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Patented Jan. 3, 1939 UNITED STATES PATENT OFFICE LOOM HARNESS STOP MOTION Application April 30, 1938, Serial No. 205,148

Claims.

This invention relates to a harness ,stop motion device; and has for one of its objects to provide a stop motion device which will be actuated upon the faulty movement of a loom harness.

VAnother object of the invention is to provide a stop motion device which will be held securely either in a position for actuating the stop motion mechanism or in an inoperative position whereby vibration of the loom will not cause it to accidentally function.

Another object of the invention is the formation of a simple and inexpensive device which may be attached to looms already in use by one or more different mountings and in one or more different places on the loom whereby actuation will be had by faulty movement of the harness.

Another object of the invention is to locate a harness stop motion device in position to be actuated by the upper horizontal bar of a loom harness `frame by reason of its being positioned between the upper and lower bars of the harness in the loom.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described, and particularly pointed out in the appended claims.

In the accompanying drawing:

Fig. 1 is a side elevation of a fragmental portion of a loom illustrating my stop motion device in its relative position to the harness of the loom;

Fig. 2 is a face view of a harness and a fragmental portion of the framework of the loom illustrating the position of the device with relation to the harness;

Fig. 3 is a perspective view of the stopmotion device detached from the loom;

Fig. 4 is a side elevation of the device partly broken away illustrating two different positions of the actuating member;

Fig. 5 is a side elevation of a floor mount for the device and also showing diagrammatically the position of harnesses above the device;

Fig. 6 is a fragmental elevation of the relation of parts of the machine.

In the operation of looms it is desirable tol provide some sort of arrangement so that the loom will stop should any of the mechanism which operates the harness fail or the reciprocation of the harness in the loom be faulty. Different stop motions have been used for this purpose, but it is my intention to provide a more simple and more positive acting stop motion and one which may be located above the floor if desirable to be actuated by the upper horizontal bar of the loom harness whereas usually the lower bar has been used for such actuation; and in order to accomplish this I have provided a finger which will actuate the stop motion and have locked this finger in either raised or lowered position to be shifted by some means such as a lever when the lever is engaged by a harness which has moved out of its normal path of travel in the loom; and the following is a more detailed description of the present embodiment of this invention, illustrating the preferred means by which these advantageous results may be accomplished.

With reference to the drawing, I have shown the framework of a loom I0, the lay at II, drop wires at I2 and a part of a stop motion mechanism at I3 extending through an opening in the drop wires. The warps are illustrated at I4 and I5 as extending through an opening in the drop wires and are arranged to be operated by harnesses I6, Il, I 8 and I9. These harnesses are reciprocated by certain known mechanism including the harness hooks in the upper bar 23, slide cord 2| adjustably connected thereto by a connector 22 with the cord extending over rollers 25 to be connected to. a leather strap, thence through the stirrup and hooks to the saddle and jack in a usual manner, while the lower bars of the harnesses are connected by springs 3l attached to hooks 32 and to hooks fastened into the floor, also in a known manner.

Any of this harness operating mechanism may fail to cause the harnesses to either drop or to tilt and thus their path of movement Will be out of proper line and a fault will occur in the cloth. In order to avoid the removal of a large number of picks for the correction of the fault it isy desirable that the loom be made to stop immediately upon the happening of such fault; and in order to accomplish this I have mounted stop motion devices which I show in perspective in Fig. 3 and designate generally as 35, one at either side of the harnesses to be operated by the failure of one of the harnesses.

This device 35 consists of a mounting 36 which may take the form of an L-shaped arm, as shown in Fig. 3, or it may take the form of a standard 3l, as shown in Fig. 5, supported on the floor. In Fig. 3 the L-shaped arm is adjustably mounted on a bracket 38 of any convenient shape and form to fit the framework of the loom and provide a screw stud 39 to extend through the slot 40 to adjustably clamp the arm 36 in position.

. In Fig. 5 an adjustment is provided by reason of the screw 4I and slot 42 in the standard 31, that the proper location of the device may be had with asu reference to its position closely adjacent to the loom harness.

Upon the mount 36 or 31 I have provided a fixed arm 45 which provides a pivot supportJ as at 46 for a member 41 which is generally L-shaped, as shown in Fig. 3, with the pivot 46 being at one end of the arm 48, while the other arm 49 extends forwardly and away from the mount. This member will usually be formed of a piece of metal which is provided with a cam surface consisting of curvilinear recesses 5|] at the inner junction of the L-shaped arms 48 and 49 and recesses 5| in the arm 48 closely adjacent and usually each on the arc of a circle with a projecting portion 52 between them. The arm 49 is usually twisted as at 53. An adjustment may be had of the arm 49 by reason of a sliding arrangement of the parts 55 and 56 thereof with a clamp 51 to hold them in desired adjusted position by the bolt 58, see Fig. 4 for a clear illustration thereof.

A finger 54 is mounted on the end of the arm 49 which when in one position will engage the portion of the bar of the stop motion device. The bar I3 of the stop motion rocks back and forth unless engaged by the upper end 61 of the drop wire I2, which stops this rocking motion and this causes the stopping of the loom in a known manner. The finger 54 is slotted as at 58 in a manner to similarly engage this bar I3 and stop rocking motion thereof, and consequently cause stopping of the loom. A lever is pivoted as at 6I onthe mount 3S or 31 and consists of a bifurcated portion 62 at one end mounting a roll 63 therein. I'his bifurcated end straddles the arm 48 ofthe member 41 and the roll 63 of a size to fit-into the` arcuate or curvilinear recesses 50 or 5| on either side of the projecting portion 52 between these arcuate portions holds this lever in one position or the other unless the lever is forced downwardly by engagement on the opposite side of its pivot or between its pivot and its end 64.

The arrangement `of this device is such that no joggling or amount of pressure on the outer end of the member 41 will cause the dropping of this member or movement of the roll from one recess to the other, it being necessary for such movement that the lever will be forcibly moved such forrinstance as by the engagement or weight of a harness which may strike it or rest upon it, and when such lever is shifted and the member 41 drops from its dotted line position from Fig. 4 to its full line position, the engagement is such that the member is locked in this position and will not be joggled or accidentally moved therefrom, it being necessary to replace it my manual manipulation of both the lever and member 41 in order to accomplish such shifting.

This stop motion device is so arranged that it may be located above the Warps and just below the upper horizontal bar of the harness so that it may be engaged by the upper bar of the harness and thus a Wide choice of positions may be had, and my location of the device of this character between the upper and lower bars of the harness I believe to be novel and a location where advantageous operation may be had.

In Fig. 5 I have illustrated the arm 41 as equipped with a Z-shaped section 1D which enables this arm to reach up from the mounting on the fioor to a position to allow its finger portions 54 to engage the bar I3 upon actuation by one of the harnesses.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the invention being defined and limited only by the terms of the appended claims.

I claim:

1. A harness stop motion device comprising a mount, a member pivoted on said mount and pref senting a cam surface, a lever pivoted on said mount with a portion engaging said cam surface, said cam surface being shaped to lock the member in at least two diiferent positions.

2. A harness stop motion device comprising a mount, a member pivoted on said mount and presenting two curved recesses with a projecting portion between, a lever pivoted on said mount with a roll to i'lt either of said recesses and be held in either recess by said projecting portion between, said lever being movable by engaging the portion on the opposite side of the pivot to shift the roll from one recess to another.

3. In combination with a loom having harnesses and a stop mechanism, a member movably mounted to operate said mechanism when in one position and to be free and clear from said mechanism when in another position, and means to lock said member in one position, said means being engageable by a harness when moving in a faulty manner to shift said member to the other position and lock it in such other position.

4. A harness stop motion device comprising a mount, a member pivoted on said mount and provided with spaced recesses, and a lever pivoted on said mount with a portion selectively engageable with said recesses to support and lock said member in at least two different positions.

5. A harness stop motion device comprising a plurality of pivotally connected levers operably connected together and relatively movable, one of said levers being mounted to drop by gravity, said levers being arranged to be locked in one relative position against movement, a portion of the other of said levers being positioned to be engageable and moved by a defective harness to release the first said lever whereby it will be gravity urged to a position to engage and actuate the stop mechanism of the loom.

HORMIDAS DESMARAIS. 

